The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/netinet/if_ether.h

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    1 /*
    2  * Copyright (c) 1982, 1986, 1993
    3  *      The Regents of the University of California.  All rights reserved.
    4  *
    5  * Redistribution and use in source and binary forms, with or without
    6  * modification, are permitted provided that the following conditions
    7  * are met:
    8  * 1. Redistributions of source code must retain the above copyright
    9  *    notice, this list of conditions and the following disclaimer.
   10  * 2. Redistributions in binary form must reproduce the above copyright
   11  *    notice, this list of conditions and the following disclaimer in the
   12  *    documentation and/or other materials provided with the distribution.
   13  * 3. All advertising materials mentioning features or use of this software
   14  *    must display the following acknowledgement:
   15  *      This product includes software developed by the University of
   16  *      California, Berkeley and its contributors.
   17  * 4. Neither the name of the University nor the names of its contributors
   18  *    may be used to endorse or promote products derived from this software
   19  *    without specific prior written permission.
   20  *
   21  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
   22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
   25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   31  * SUCH DAMAGE.
   32  *
   33  *      @(#)if_ether.h  8.3 (Berkeley) 5/2/95
   34  * $FreeBSD$
   35  */
   36 
   37 #ifndef _NETINET_IF_ETHER_H_
   38 #define _NETINET_IF_ETHER_H_
   39 
   40 #include <net/ethernet.h>
   41 #include <net/if_arp.h>
   42 
   43 /*
   44  * Macro to map an IP multicast address to an Ethernet multicast address.
   45  * The high-order 25 bits of the Ethernet address are statically assigned,
   46  * and the low-order 23 bits are taken from the low end of the IP address.
   47  */
   48 #define ETHER_MAP_IP_MULTICAST(ipaddr, enaddr) \
   49         /* struct in_addr *ipaddr; */ \
   50         /* u_char enaddr[ETHER_ADDR_LEN];          */ \
   51 { \
   52         (enaddr)[0] = 0x01; \
   53         (enaddr)[1] = 0x00; \
   54         (enaddr)[2] = 0x5e; \
   55         (enaddr)[3] = ((u_char *)ipaddr)[1] & 0x7f; \
   56         (enaddr)[4] = ((u_char *)ipaddr)[2]; \
   57         (enaddr)[5] = ((u_char *)ipaddr)[3]; \
   58 }
   59 
   60 /*
   61  * Ethernet Address Resolution Protocol.
   62  *
   63  * See RFC 826 for protocol description.  Structure below is adapted
   64  * to resolving internet addresses.  Field names used correspond to
   65  * RFC 826.
   66  */
   67 struct  ether_arp {
   68         struct  arphdr ea_hdr;  /* fixed-size header */
   69         u_char  arp_sha[ETHER_ADDR_LEN];        /* sender hardware address */
   70         u_char  arp_spa[4];     /* sender protocol address */
   71         u_char  arp_tha[ETHER_ADDR_LEN];        /* target hardware address */
   72         u_char  arp_tpa[4];     /* target protocol address */
   73 };
   74 #define arp_hrd ea_hdr.ar_hrd
   75 #define arp_pro ea_hdr.ar_pro
   76 #define arp_hln ea_hdr.ar_hln
   77 #define arp_pln ea_hdr.ar_pln
   78 #define arp_op  ea_hdr.ar_op
   79 
   80 struct sockaddr_inarp {
   81         u_char  sin_len;
   82         u_char  sin_family;
   83         u_short sin_port;
   84         struct  in_addr sin_addr;
   85         struct  in_addr sin_srcaddr;
   86         u_short sin_tos;
   87         u_short sin_other;
   88 #define SIN_PROXY 1
   89 };
   90 /*
   91  * IP and ethernet specific routing flags
   92  */
   93 #define RTF_USETRAILERS RTF_PROTO1      /* use trailers */
   94 #define RTF_ANNOUNCE    RTF_PROTO2      /* announce new arp entry */
   95 
   96 #ifdef  KERNEL
   97 extern u_char   ether_ipmulticast_min[ETHER_ADDR_LEN];
   98 extern u_char   ether_ipmulticast_max[ETHER_ADDR_LEN];
   99 extern struct   ifqueue arpintrq;
  100 
  101 int     arpresolve __P((struct arpcom *, struct rtentry *, struct mbuf *,
  102                         struct sockaddr *, u_char *, struct rtentry *));
  103 void    arp_ifinit __P((struct arpcom *, struct ifaddr *));
  104 #endif
  105 
  106 #endif

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